Record terminal demos as a terminal GIF, MP4, or WebM demo video from a .tape text file with vhs (Charm, charmbracelet): tape syntax, Output, Require, Set options (size, font, theme, typing speed, window bar, margin), typing and key commands, Sleep and Wait, Hide and Show, Screenshot, Source, and CI usage. Use when documenting a CLI or TUI with an animated demo, screencast, terminal recording, or screen recording for a README, or asserting its output in tests with golden files. Not for writing the program itself.